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ALUMINUM
106
COPPER
467
STEEL M.S.
35
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Earthing Conductor Size for Motors

Rating of
Motors (HP)

Earthing conductors

CU.

Al.

Upto 5

10 SWG

25

6 to 10

10 SWG

25

11 to 17

10 SWG

25

18 to 20

10 SWG

25

21 to 25

10 SWG

25

26 to 30

6 SWG

35

31 to 40

6 SWG

35

41 to 50

4 SWG

35

51 to 60

4 SWG

50

61 to 75

4 SWG

50

76 to 100

2 SWG

70

101 to 125

2 SWG

95

126 to 150

1 SWG

120

151 to 175

1 SWG

120

176 to 200

1 SWG

120

201 to 225

25 × 3 mm

185

226 to 250

25 × 3 mm

185

 

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